US20100258244A1 - Lateral pipe-lining method and flange-pressing implement for lateral pipe-lining material used in the method - Google Patents
Lateral pipe-lining method and flange-pressing implement for lateral pipe-lining material used in the method Download PDFInfo
- Publication number
- US20100258244A1 US20100258244A1 US12/798,797 US79879710A US2010258244A1 US 20100258244 A1 US20100258244 A1 US 20100258244A1 US 79879710 A US79879710 A US 79879710A US 2010258244 A1 US2010258244 A1 US 2010258244A1
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- US
- United States
- Prior art keywords
- flange
- lateral pipe
- lining
- pipe
- pressing implement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/179—Devices for covering leaks in pipes or hoses, e.g. hose-menders specially adapted for bends, branch units, branching pipes or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1651—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being everted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0017—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor characterised by the choice of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0017—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor characterised by the choice of the material
- B29C63/0021—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor characterised by the choice of the material with coherent impregnated reinforcing layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0047—Preventing air-inclusions
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C63/0056—Provisional sheathings
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0065—Heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0065—Heat treatment
- B29C63/0069—Heat treatment of tubular articles
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0073—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor of non-flat surfaces, e.g. curved, profiled
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
- B29C63/16—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material applied by "rubber" bag or diaphragm
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
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- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/22—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using layers or sheathings having a shape adapted to the shape of the article
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Definitions
- the present invention relates to a lateral pipe-lining method for lining a lateral pipe using a lateral pipe-lining material impregnated with a curable resin having a flange formed at one end thereof, and a flange-pressing implement for a lateral pipe-lining material used in the lateral pipe-lining method.
- These methods employ a pipe-lining material having a flexible tubular resin-absorbing material impregnated with a curable resin that is covered with a highly airtight film on the exterior thereof.
- the pipe-lining material is everted and inserted into the pipe using hydrostatic pressure.
- the pipe-lining material is heated while being pressed against the internal peripheral surface of the pipe by the hydrostatic pressure, and the resin impregnated in the pipe-lining material is cured, thereby lining the internal peripheral surface of the pipe.
- Such a method can be applied to a lateral pipe that branches from a main pipe, as described in Japanese Laid-open Patent Application Nos. 1992-355115 and 2008-168468.
- a lateral-pipe lining material with a flange formed at one end thereof is prepared and housed in a pressure bag.
- the flange of the lateral pipe-lining material is positioned on a head collar of a work robot introduced inside the main pipe and is brought into close contact with the lateral pipe opening in the main pipe by driving the work robot. Compressed air is fed inside the pressure bag to evert and insert the lateral pipe-lining material into the lateral pipe.
- the lateral pipe-lining material When the pipe-lining material is everted and inserted throughout the entire length of the lateral pipe, the lateral pipe-lining material is kept pressed against the internal peripheral surface of the lateral pipe and heated to cure the impregnated thermosetting resin. The internal peripheral surface of the lateral pipe is lined by the lateral pipe-lining material thus cured.
- the flange of the lateral pipe-lining material is usually impregnated with a thermosetting resin and previously cured when it is manufactured in the factory.
- the flange of the lateral pipe-lining material is made of a thermoplastic resin.
- the flange of the lateral pipe-lining material lacks flexibility at room temperature. Therefore, an adequately close contact with the periphery of the lateral pipe opening of the main pipe cannot be achieved when there is a manufacturing error in the flange or when there are concavities and convexities in the periphery of the lateral pipe opening of the main pipe.
- An object of the present invention is to provide a lateral pipe-lining method for lining a lateral pipe that is capable of bringing the flange of a lateral pipe-lining material into adequately close contact with the periphery of the lateral pipe opening of the main pipe to line the lateral pipe with high quality; and to provide a flange-pressing implement for a lateral pipe-lining material that is used in the lateral pipe-lining method.
- a lateral pipe-lining method for lining a lateral pipe that intersects a main pipe comprising:
- a lateral pipe-lining material having a tubular resin-absorbing material impregnated with a curable resin and having a flange formed at one end thereof;
- the present invention is also characterized by a flange-pressing implement used in the lateral pipe-lining method.
- the flange-pressing implement comprises an inner bag having a hose mounted thereon; and a bag-shaped cover for covering the inner bag.
- a fluid is fed into the inner bag via the hose to expand the inner bag and press the flange of the lateral pipe-lining material against the periphery of the lateral pipe opening of the main pipe.
- the present invention is also characterized by a flange-pressing implement used in the lateral pipe-lining method.
- the flange-pressing implement comprises a tube mounted in a spiral shape and having a hose attached to one end thereof. A fluid is fed into the tube via the hose to expand the tube in a circular or elliptical shape and press the flange of the lateral pipe-lining material against the periphery of the lateral pipe opening of the main pipe.
- the flange of the lateral pipe-lining material makes adequately close contact with the periphery of the lateral pipe opening of the main pipe, and therefore, a gap is not produced therebetween. Accordingly, neither underground water nor earth or sand from the ground flows into the main pipe via the gap between the flange of the lateral pipe-lining material and the periphery of the lateral pipe opening of the main pipe. Therefore, the drainage performance of the main pipe can be improved.
- FIG. 1 is a cross-sectional view of a lateral pipe-lining material used in the method of the present invention
- FIG. 2 is a schematic illustrative view showing a process for fabricating an inner bag of a flange-pressing implement
- FIG. 3 a is a top view showing a reinforcement cover for covering the inner bag of the flange-pressing implement
- FIG. 3 b is a top view of the flange-pressing implement
- FIG. 3 c is a cross-sectional view along the line A-A of FIG. 3 b;
- FIG. 4 is a perspective view of a head collar mounted on the work robot
- FIG. 5 a is a perspective view showing the head collar on which the flange-pressing implement has been mounted
- FIG. 5 b is a perspective view showing the head collar on which a protective cover has been mounted
- FIG. 6 a is a perspective view showing the head collar on which the lateral pipe-lining material has been positioned
- FIG. 6 b is a perspective view showing an adhesive applied onto the flange of the lateral pipe-lining material
- FIG. 7 a is a longitudinal sectional view of the head collar before the flange-pressing implement is expanded
- FIG. 7 b is a longitudinal sectional view of the head collar at the time when the flange-pressing implement has been expanded;
- FIGS. 8 and 9 are illustrative views each showing a method for lining the lateral pipe using the lateral pipe-lining material
- FIG. 10 is an illustrative view showing a heater arranged on the flange-pressing implement
- FIG. 11 is an illustrative view showing a flange-pressing implement having a tube wound around the head collar;
- FIG. 12 a is a perspective view of the head collar on which the flange-pressing implement and a cover sheet have been mounted;
- FIG. 12 b is a perspective view of the head collar having a protective cover attached to the flange-pressing implement;
- FIG. 13 a is a longitudinal sectional view of the head collar to which the cover sheet and the lateral pipe-lining material have been attached;
- FIG. 13 b is a longitudinal sectional view of the head collar together with the lateral pipe-lining material whose flange is coated with an adhesive;
- FIG. 14 is an illustrative view showing a method for lining a lateral pipe using the head collar to which the cover sheet has been attached.
- FIG. 1 shows a lateral pipe-lining material 1 for lining a lateral pipe that intersects a main pipe.
- the lateral pipe-lining material 1 has a soft tubular resin-absorbing material 2 , and one end thereof is outwardly folded back to constitute a brim-shaped flange 3 .
- the portion that does not include the flange 3 of the tubular resin-absorbing material 2 is impregnated with an uncured liquid thermosetting resin, and is coated at the external surface thereof with a highly airtight plastic film 4 composed of polyethylene, polypropylene, nylon, vinyl chloride, or the like (the external surface becoming the internal peripheral surface when everted).
- the tubular resin-absorbing material 2 is composed of a matte, woven, or non-woven material made of polyamide, polyester, polypropylene, or another plastic fiber; a matte or woven material made of glass fiber; or a matte, woven, or non-woven material having a combination of the plastic fiber and fiber glass.
- the thermosetting resin impregnated in the tubular resin-absorbing material 2 is, e.g., an unsaturated polyester resin, vinyl ester resin, or epoxy resin.
- the flange 3 formed at one end of the tubular resin-absorbing material 2 has a curved surface whose curvature is substantially equal to that of a later-described main pipe 30 (see FIG. 8 ).
- the outside diameter of the flange 3 is set to be greater than the inside diameter of a lateral pipe 31 (see FIG. 8 ).
- the flange 3 is impregnated with a thermosetting resin, which is previously cured in the factory so as to provide a rigid flange whose curvature fits to that of the main pipe.
- the flange 3 may be composed of a vinyl chloride or other thermoplastic resin rather than a thermosetting resin. In this case, the flange 3 and the tubular resin-absorbing material 2 are joined together using an adhesive or the like.
- a peeling tube 5 of predetermined length is passed over the exterior of the tubular resin-absorbing material 2 , and one end of the peeling tube 5 is removably attached to the external periphery in the vicinity of the flange 3 of the tubular resin-absorbing material 2 .
- the other end of the peeling tube 5 is open and mounted in an airtight manner to a pressure bag (described later).
- the same material used for the plastic film 4 may be used for the peeling tube 5 .
- a tubular peeling end 6 is removably mounted on the other end of the tubular resin-absorbing material 2 .
- the peeling end 6 is composed of the same material as the plastic film 4 and one end is closed off by a connector 7 .
- a flange-pressing implement 70 having an inner bag 73 that is covered with a reinforcement cover 74 is used to bring the flange 3 of the lateral pipe-lining material 1 into close contact with the periphery of the lateral pipe opening of the main pipe.
- the inner bag 73 is fabricated as shown in FIG. 2 .
- a sheet 71 having a circular opening portion 71 a in the center and protruding portions 71 b, 71 c in a side portion is placed over a sheet 72 similarly having a circular opening portion 72 a in the center and protruding portions 72 b, 72 c in a side portion so as to form a bag shape.
- a peripheral portion 73 d and the external peripheral portion 73 e of the opening portions 71 a, 72 a are respectively bonded airtightly.
- the sheets 71 , 72 are made of polyethylene, polypropylene, nylon, vinyl chloride, or another highly airtight plastic.
- the inner bag 73 thus fabricated has an opening portion 73 a that corresponds to the opening portions 71 a, 72 a of the sheets 71 , 72 .
- the opening portion 73 a of the inner bag 73 has a size that allows the cylindrical portion of a later-described head collar to pass.
- the distal ends of the protruding portions 71 b, 72 b of the sheets 71 , 72 are not bonded and are therefore used as an intake port 73 b for taking in a later-described heat medium.
- the distal ends of the protruding portions 71 c, 72 c are not bonded and are therefore used as a drainage port 73 c for discharging the heat medium inside the inner bag 73 .
- a heat medium feed hose 75 and a heat medium drainage hose 76 are mounted in an airtight manner on the heat medium intake port 73 b and drainage port 73 c of the inner bag 73 .
- the inner bag 73 is covered with a reinforcement cover 74 made of cashmere, silk, nylon, rayon, or another fiber; or silicon, polyethylene, polyurethane, or another material that does not easily stretch.
- the reinforcement cover 74 has an opening 74 a that corresponds to the opening portions 71 a, 72 a of the sheets 71 , 72 ; and protruding portions 74 b, 74 c that correspond to the protruding portions 71 b, 71 c, 72 b, 72 c.
- the reinforcement cover 74 has a shape similar to that of the sheets 71 , 72 , but the overall size is slightly smaller than the sheets 71 , 72 .
- a reinforcement cover 74 ′ ( FIG.
- the reinforcement covers 74 , 74 ′ have a shape that is slightly smaller than that of the sheets 71 , 72 of the inner bag 73 . Therefore, the sheets 71 , 72 in the inner bag 73 are housed in a wrinkled state, as shown in FIG. 3 c.
- FIG. 3 c is a cross-sectional view along the line A-A of FIG. 3 b, which is not an accurate cross-sectional view, but rather schematically shows the inner bag 73 to be housed in a wrinkled state.
- the thus configured flange-pressing implement 70 has an opening portion 70 a in the center portion into which the cylindrical portion of the head collar can be inserted, and protruding portions 70 b, 70 c on which the heat medium feed hose 75 and the heat medium drainage hose 76 are mounted, as shown in FIG. 3 b.
- a fluid liquid, air
- the inner bag 73 expands overall in the form of a flat bag and generates a pressing force.
- the inner bag 73 is pressed against the reinforcement covers and does not completely expand, thereby preventing breakage or the application of an excessive load to the inner bag.
- the external shape of the flange-pressing implement 70 is not limited to being rectangular, as shown in the drawings, and may also be circular or triangular.
- FIG. 4 shows a metal head collar (pressing jig) 80 that is mounted on a work robot (described later) and a pressure bag to position the lateral pipe-lining material on the lateral pipe.
- the head collar 80 has a curved portion 80 a having a curvature that corresponds to the curvature of the internal peripheral surface of the main pipe.
- a hollow cylindrical portion 80 b of the head collar 80 passes through the curved portion 80 a and extends downward.
- the outside diameter of the cylindrical portion 80 b of the head collar 80 is slightly less than the diameter of the opening portion 70 a of the flange-pressing implement 70 so that the cylindrical portion 80 b of the head collar 80 can pass through the opening portion 70 a of the flange-pressing implement 70 .
- the cylindrical portion 80 b of the head collar 80 is passed through the opening portion 70 a of the flange-pressing implement 70 so that the flange-pressing implement 70 may be mounted on the head collar 80 , as shown in FIG. 5 a.
- the flange-pressing implement 70 is not particularly required to be secured, but may be detachably mounted on the head collar 80 using adhesive tape in the case that there is a possibility that the flange-pressing implement 70 will move.
- an adhesive is applied to the flange of the lateral pipe-lining material.
- the flange-pressing implement 70 and the head collar 80 are covered by a protective film 81 that is larger than the head collar 80 , as shown in FIG. 5 b.
- the protective film 81 has a central opening portion that has substantially the same diameter as the opening portion 70 a of the flange-pressing implement 70 . Therefore, the cylindrical portion 80 b of the head collar 80 is passed through the opening portion of the protective film 81 , and the protective film 81 can be placed on the flange-pressing implement 70 and the head collar 80 .
- the protective film 81 is secured to the curved portion of the head collar 80 using an adhesive or the like so that the protective film 81 does not move.
- the lateral pipe-lining material 1 shown in FIG. 1 is inserted from the portion (the portion on which the connector 7 is mounted) of the tubular resin-absorbing material 2 into the cylindrical portion 80 b of the head collar 80 , and the flange 3 thereof is placed on the protective film 81 so as to cover the cylindrical portion 80 b thereof, as shown in FIG. 6 a.
- the outside diameter of the cylindrical portion 80 b of the head collar 80 is made less than the inside diameter of the flange 3 so as to allow the cylindrical portion 80 b of the head collar 80 to pass through the flange 3 of the lateral pipe-lining material 1 and the flange 3 to lie on the head collar 80 .
- the lateral pipe-lining material 1 is placed on the head collar 80 via the protective film 81 and the flange-pressing implement 70 .
- An adhesive 82 composed of unsaturated polyester resin, vinyl ester resin, epoxy resin, or the like is then coated onto the surface of the flange 3 ( FIG. 6 b ).
- the lateral pipe-lining material 1 mounted on the head collar 80 is accommodated inside a pressure bag 43 , as shown in FIG. 8 , and the head collar 80 is mounted in an airtight fashion at one end of the pressure bag 43 .
- the work robot 42 has a head 44 that reciprocates in the vertical direction a, b in FIG. 8 , and is configured so as to rotate (rolling) about the pipe axis in the manner indicated by the arrow c.
- the head collar 80 is mounted on a head 44 .
- a monitoring TV camera 46 is disposed on the upper part of the work robot 42 .
- Draw ropes 47 , 48 are attached to the front and rear of the work robot 42 .
- the draw rope 47 is connected to the pressure bag 43 and the other draw rope 48 is extended to above ground.
- the draw rope 48 is pulled to convey the work robot 42 and the pressure bag 43 so that the flange 3 of the pipe-lining material 1 may be located in the vicinity of the lateral pipe 31 that intersects the main pipe 30 .
- the open end of the pressure bag 43 is closed by a cap 52 , and the other end of the peeling tube 5 that is mounted on the tubular resin-absorbing material 2 of the lateral pipe-lining material 1 is mounted in an airtight manner inside the pressure bag 43 .
- a draw rope 40 and a hot water hose 41 that are attached to the cap 52 in an airtight manner are connected to the connector 7 on which the peeling end 6 of the lateral pipe-lining material 1 is mounted.
- the hot water hose 41 passes through the cap 52 , extends away from the pressure bag 43 , and leads to a valve 53 .
- a hot water pump 54 feeds hot water (heat medium) to the hot water hose 41 from a hot water tank 55 that is heated by a heat source (not shown).
- the hot water inside the pressure bag 43 is returned to the hot water tank 55 via a drainage hose 56 and valve 57 .
- Hot water is also fed via the hot water pump 54 and a valve 66 from the hot water tank 55 to the heat medium feed hose 75 mounted on the flange-pressing implement 70 .
- the hot water inside the flange-pressing implement 70 is returned to the hot water tank 55 via the heat medium drainage hose 76 and a valve 65 .
- An airtight space closed off by the lateral pipe-lining material 1 and the peeling tube 5 is formed inside the pressure bag 43 .
- a compressor 61 disposed above ground is connected via an air hose 59 and valve 60 to the airtight space inside the pressure bag to feed compressed air thereto.
- the airtight space is also in communication with the exterior via a drainage hose 62 and valve 63 to discharge the compressed air inside the pressure bag to the exterior.
- the draw rope 48 is pulled to move the pressure bag 43 to the location in which the center of the cylindrical portion 80 b of the head collar 80 substantially coincides with the axial center of the lateral pipe 31 ( FIG. 8 ).
- the head 44 of the work robot 42 is raised in the direction of arrow a to press the flange 3 of the lateral pipe-lining material 1 into close contact with the periphery of the lateral pipe opening of the main pipe 30 via the flange-pressing implement 70 . Close contact is reduced when there is manufacturing error in the flange 3 or when there are concavities and convexities in the periphery of the lateral pipe opening. In view of such circumstances, in the present invention, the flange-pressing implement 70 is expanded to press the flange 3 against the periphery of the lateral pipe opening.
- Hot water is fed from the hot water tank 55 via the heat medium feed hose 75 to the inner bag 73 of the flange-pressing implement 70 .
- the flange-pressing implement 70 is then caused to expand in the form of a flat bag as shown in FIG. 7 b.
- Hot water that cannot be accommodated is returned to the hot water tank 55 via the heat medium drainage hose 76 .
- the circulation of hot water through the flange-pressing implement 70 causes elastic pressing force to be produced therein to bring the flange 3 into close contact with the periphery 30 a of the lateral pipe opening of the main pipe 30 .
- FIGS. 7 a and 7 b are not accurate sectional views of the flange-pressing implement 70 , but are schematic views for illustrating the state of expansion.
- the pressing force produced by the flange-pressing implement 70 can be adjusted via the valve 66 by adjusting the feed rate of the hot water to the flange-pressing implement 70 .
- the pressing force produced by the flange-pressing implement 70 can also be adjusted via the valve 65 by adjusting the drainage rate of the hot water returned from the flange-pressing implement 70 to the hot water tank 55 . It is also possible to adjust the pressing force of the flange-pressing implement 70 by adjusting both the feed and drainage rates of the hot water.
- Hot water at a temperature of about 60° to 90° C. is fed to the flange-pressing implement 70 . Therefore, the flange 3 is gradually heated, and the adhesive 82 coated thereon is cured. This allows the flange 3 to be bonded to the periphery 30 a of the lateral pipe opening of the main pipe 30 .
- the flange 3 is composed of a thermosetting resin and the adhesive 82 on the flange 3 is adequately heated by heat conduction by hot water even when the thermosetting resin in the flange 3 has already been cured.
- the flange 3 is made of a thermoplastic resin
- the flange 3 is softened by heating and comes into closer contact with the periphery of the lateral pipe opening, thus allowing the flange 3 to be bonded to the main pipe 30 more reliably.
- the compressor 61 is driven to feed compressed air into the airtight space inside the pressure bag 43 via the air hose 59 .
- the lateral pipe-lining material 1 is kept to be pressed against the internal peripheral surface of the lateral pipe 31 , and hot water is fed from the distal end of the hot water hose 41 and filled into the airtight space inside the pressure bag 43 .
- the compressed air inside the airtight space is released into the atmosphere via the exhaust hose 62 , while the thermosetting resin impregnated in the tubular resin-absorbing material 2 of the lateral pipe-lining material 1 is heated and cured by the hot water.
- the flange-pressing implement is expanded before the lateral pipe-lining material is inserted into the lateral pipe.
- the head 44 of the work robot 42 is lowered in the direction of the arrow b in the drawing and the flange-pressing implement 70 is separated from the flange 3 of the lateral pipe-lining material 1 .
- the draw rope 40 is thereafter pulled in the leftward direction in FIG. 9 .
- the peeling tube 5 , the peeling end 6 , the hot water hose 41 , and the like are pulled in the same direction and removed from the lateral pipe-lining material 1 .
- the work robot 42 , the pressure bag 43 , and the like are then removed from inside the main pipe 30 to finish the lining of the internal peripheral surface of the lateral pipe 31 .
- the heat medium used for expanding the flange-pressing implement 70 and heating the adhesive 82 on the flange 3 may be hot air or a heated liquid.
- the heat source for obtaining hot air or the heat source for heating the liquid, and a circulation system for circulating the hot air or the heated liquid is prepared in the case that hot air or heated liquid is used as the heat medium.
- the medium for heating the adhesive 82 is the same fluid for expanding the flange-pressing implement 70 , but instead it is possible to use a heater 90 such as that shown in FIG. 10 to heat the adhesive 82 .
- the heater 90 is composed of a Nichrome wire or another serpentine heater wire 90 a that produces heat when voltage is applied.
- the heater 90 is overall covered by a cover 91 having waterproofness and insulative properties.
- the cover 91 is substantially the same size as the flange-pressing implement 70 , and an opening portion 91 a having the same size as the opening portion 70 a of the flange-pressing implement 70 is formed in the center of the cover 91 .
- the heater 90 is energized from above ground.
- the heater 90 is disposed on the flange-pressing implement 70 protected by the protective film 81 , and the cylindrical portion 80 b of the head collar 80 is inserted through the opening portion 91 a of the heater 90 to receive the flange 3 of the lateral pipe-lining material 1 on the heater 90 .
- a single hose is connected to the flange-pressing implement 70 to feed compressed air from the compressor 61 because a fluid circulation system would not be required.
- the heater 90 is disposed between the protective film 81 and the flange 3 of the lateral pipe-lining material 1 .
- the flange-pressing implement 70 is expanded using compressed air and the heater 90 is energized, the flange 3 is pressed against the periphery 30 a of the lateral pipe opening of the main pipe 30 in the same manner as when hot water is used. Since the adhesive 82 on the flange 3 is heated and cured by the heater 90 , the flange 3 can be secured to the main pipe 30 in a state of reliable close contact therewith in the same manner as when hot water is used.
- FIG. 11 shows another embodiment of the flange-pressing implement in which an expandable tube 100 is wound a plurality of times about the cylindrical portion 80 b of the head collar 80 .
- the tube 100 wound about the cylindrical portion 80 b is bundled by elastic tapes 101 to prevent disassembly.
- a hose (not shown) is attached in an airtight manner to a mounting end 100 a of the tube 100 , and another hose (not shown) is also attached to the other end 100 b of the tube 100 .
- the tube 100 expands in a circular or elliptical shape when hot water is fed from the hot water tank 55 via one of the hoses.
- the excess hot water in the tube 100 is returned to the hot water tank 55 via the other hose.
- An elastic pressing force is generated in the tube 100 by circulating hot water.
- the pressing force produced by the tube 100 can be adjusted by adjusting the feed rate of the hot water to the tube 100 via the valve 66 , by adjusting the drainage rate of the hot water to the hot water tank 55 via the valve 65 , or by adjusting both the feed and drainage rates of the hot water.
- the flange-pressing implement 70 , the protective film 81 , and the lateral pipe-lining material 1 may be mounted on the head collar 80 after the head collar 80 has been first positioned on the work robot. It is also possible to first mount the flange-pressing implement 70 and the protective film 81 on the head collar 80 , then position the head collar 80 on the work robot, and thereafter position the lateral pipe-lining material 1 on the head collar 80 .
- the head 44 of the work robot 42 lifts the head collar 80 upward from one side (the right side in FIG. 8 ), and the flange 3 presses against the main pipe 30 . Accordingly, there is a problem in that the orientation of the work robot 42 becomes unstable due to the reaction.
- the lower portion of the head collar 80 is covered by a cover sheet 120 , as shown in FIG. 12 a.
- the pressure bag 43 is caused to expand by compressed air and makes contact with the cover sheet 120 to support the opposite side (the left side in FIG. 8 ) of the head collar 80 .
- the cover sheet 120 is a soft cover material composed of cloth or plastic, and tightly stretched over the lower portion of the curved portion 80 a of the head collar 80 .
- One end 120 a and the other end 120 b of the cover sheet 120 are folded back and secured to the flange-pressing implement 70 using an adhesive ( FIG. 13 a ).
- the opening portion 120 c through which the pipe-lining material 1 can pass is formed in the center portion of the cover sheet 120 in a position that corresponds to the cylindrical portion 80 b of the head collar 80 .
- a hole (not shown) through which the distal end of the head 44 of the work robot 42 can pass is also formed in the cover sheet 120 .
- the head collar 80 After the head collar 80 has been covered with the cover sheet 120 , the head collar 80 is covered with the protective film 81 , as shown in FIG. 12 b.
- the lateral pipe-lining material 1 is thereafter positioned on the head collar 80 and the adhesive 82 is coated onto the flange 3 in the same manner as shown in FIGS. 6 a and 6 b.
- the head collar 80 is supported on two sides by the pressure bag 43 and the head 44 of the work robot 42 . It is possible to prevent the work robot 42 from being affected by a force that destabilizes the orientation of the work robot 42 , and the work for lining a lateral pipe can be carried out in a smooth fashion.
- the cover sheet 120 is provided across the head 44 side of the work robot 42 as well as the opposite side thereof, but there is no particular requirement that the head 44 side be covered by the cover sheet 120 , and such a portion may be omitted.
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a lateral pipe-lining method for lining a lateral pipe using a lateral pipe-lining material impregnated with a curable resin having a flange formed at one end thereof, and a flange-pressing implement for a lateral pipe-lining material used in the lateral pipe-lining method.
- 2. Description of the Related Art
- Known in the art are pipe-lining methods for lining the internal peripheral surface of aging sewer pipes or other pipes buried underground so that they can be repaired without having to be dug from the ground.
- These methods employ a pipe-lining material having a flexible tubular resin-absorbing material impregnated with a curable resin that is covered with a highly airtight film on the exterior thereof. The pipe-lining material is everted and inserted into the pipe using hydrostatic pressure. The pipe-lining material is heated while being pressed against the internal peripheral surface of the pipe by the hydrostatic pressure, and the resin impregnated in the pipe-lining material is cured, thereby lining the internal peripheral surface of the pipe.
- Such a method can be applied to a lateral pipe that branches from a main pipe, as described in Japanese Laid-open Patent Application Nos. 1992-355115 and 2008-168468. When a lateral pipe is to be lined, a lateral-pipe lining material with a flange formed at one end thereof is prepared and housed in a pressure bag. The flange of the lateral pipe-lining material is positioned on a head collar of a work robot introduced inside the main pipe and is brought into close contact with the lateral pipe opening in the main pipe by driving the work robot. Compressed air is fed inside the pressure bag to evert and insert the lateral pipe-lining material into the lateral pipe. When the pipe-lining material is everted and inserted throughout the entire length of the lateral pipe, the lateral pipe-lining material is kept pressed against the internal peripheral surface of the lateral pipe and heated to cure the impregnated thermosetting resin. The internal peripheral surface of the lateral pipe is lined by the lateral pipe-lining material thus cured.
- The flange of the lateral pipe-lining material is usually impregnated with a thermosetting resin and previously cured when it is manufactured in the factory. Alternatively, the flange of the lateral pipe-lining material is made of a thermoplastic resin. In either case, the flange of the lateral pipe-lining material lacks flexibility at room temperature. Therefore, an adequately close contact with the periphery of the lateral pipe opening of the main pipe cannot be achieved when there is a manufacturing error in the flange or when there are concavities and convexities in the periphery of the lateral pipe opening of the main pipe.
- In these cases, gaps are disadvantageously produced between the flange of the lateral pipe-lining material and the periphery of the lateral pipe opening of the main pipe when lining is complete. Underground water as well as earth and sand from the ground flow into the main pipe via the gap, and the drainage performance of the main pipe is degraded.
- An object of the present invention is to provide a lateral pipe-lining method for lining a lateral pipe that is capable of bringing the flange of a lateral pipe-lining material into adequately close contact with the periphery of the lateral pipe opening of the main pipe to line the lateral pipe with high quality; and to provide a flange-pressing implement for a lateral pipe-lining material that is used in the lateral pipe-lining method.
- According to the present invention there is provided a lateral pipe-lining method for lining a lateral pipe that intersects a main pipe, the method comprising:
- preparing a lateral pipe-lining material having a tubular resin-absorbing material impregnated with a curable resin and having a flange formed at one end thereof;
- disposing the flange of the lateral pipe-lining material on an expandable flange-pressing implement;
- pressing the flange of the lateral pipe-lining material against the periphery of a lateral pipe opening of the main pipe via the flange-pressing implement; and
- inserting the lateral pipe-lining material into the lateral pipe and curing the curable resin impregnated in the tubular resin-absorbing material to line the lateral pipe.
- The present invention is also characterized by a flange-pressing implement used in the lateral pipe-lining method. The flange-pressing implement comprises an inner bag having a hose mounted thereon; and a bag-shaped cover for covering the inner bag. A fluid is fed into the inner bag via the hose to expand the inner bag and press the flange of the lateral pipe-lining material against the periphery of the lateral pipe opening of the main pipe.
- The present invention is also characterized by a flange-pressing implement used in the lateral pipe-lining method. The flange-pressing implement comprises a tube mounted in a spiral shape and having a hose attached to one end thereof. A fluid is fed into the tube via the hose to expand the tube in a circular or elliptical shape and press the flange of the lateral pipe-lining material against the periphery of the lateral pipe opening of the main pipe.
- In accordance with the present invention, the flange of the lateral pipe-lining material makes adequately close contact with the periphery of the lateral pipe opening of the main pipe, and therefore, a gap is not produced therebetween. Accordingly, neither underground water nor earth or sand from the ground flows into the main pipe via the gap between the flange of the lateral pipe-lining material and the periphery of the lateral pipe opening of the main pipe. Therefore, the drainage performance of the main pipe can be improved.
- Further features of the invention, its nature and various advantages will be more apparent from the accompanying drawings and following detailed description of the invention.
-
FIG. 1 is a cross-sectional view of a lateral pipe-lining material used in the method of the present invention; -
FIG. 2 is a schematic illustrative view showing a process for fabricating an inner bag of a flange-pressing implement; -
FIG. 3 a is a top view showing a reinforcement cover for covering the inner bag of the flange-pressing implement; -
FIG. 3 b is a top view of the flange-pressing implement; -
FIG. 3 c is a cross-sectional view along the line A-A ofFIG. 3 b; -
FIG. 4 is a perspective view of a head collar mounted on the work robot; -
FIG. 5 a is a perspective view showing the head collar on which the flange-pressing implement has been mounted; -
FIG. 5 b is a perspective view showing the head collar on which a protective cover has been mounted; -
FIG. 6 a is a perspective view showing the head collar on which the lateral pipe-lining material has been positioned; -
FIG. 6 b is a perspective view showing an adhesive applied onto the flange of the lateral pipe-lining material; -
FIG. 7 a is a longitudinal sectional view of the head collar before the flange-pressing implement is expanded; -
FIG. 7 b is a longitudinal sectional view of the head collar at the time when the flange-pressing implement has been expanded; -
FIGS. 8 and 9 are illustrative views each showing a method for lining the lateral pipe using the lateral pipe-lining material; -
FIG. 10 is an illustrative view showing a heater arranged on the flange-pressing implement; -
FIG. 11 is an illustrative view showing a flange-pressing implement having a tube wound around the head collar; -
FIG. 12 a is a perspective view of the head collar on which the flange-pressing implement and a cover sheet have been mounted; -
FIG. 12 b is a perspective view of the head collar having a protective cover attached to the flange-pressing implement; -
FIG. 13 a is a longitudinal sectional view of the head collar to which the cover sheet and the lateral pipe-lining material have been attached; -
FIG. 13 b is a longitudinal sectional view of the head collar together with the lateral pipe-lining material whose flange is coated with an adhesive; and -
FIG. 14 is an illustrative view showing a method for lining a lateral pipe using the head collar to which the cover sheet has been attached. - The present invention will now be described in detail with reference to the embodiments shown in the attached drawings.
-
FIG. 1 shows a lateral pipe-lining material 1 for lining a lateral pipe that intersects a main pipe. The lateral pipe-lining material 1 has a soft tubular resin-absorbingmaterial 2, and one end thereof is outwardly folded back to constitute a brim-shaped flange 3. The portion that does not include theflange 3 of the tubular resin-absorbingmaterial 2 is impregnated with an uncured liquid thermosetting resin, and is coated at the external surface thereof with a highly airtightplastic film 4 composed of polyethylene, polypropylene, nylon, vinyl chloride, or the like (the external surface becoming the internal peripheral surface when everted). - The tubular resin-absorbing
material 2 is composed of a matte, woven, or non-woven material made of polyamide, polyester, polypropylene, or another plastic fiber; a matte or woven material made of glass fiber; or a matte, woven, or non-woven material having a combination of the plastic fiber and fiber glass. The thermosetting resin impregnated in the tubular resin-absorbingmaterial 2 is, e.g., an unsaturated polyester resin, vinyl ester resin, or epoxy resin. - The
flange 3 formed at one end of the tubular resin-absorbingmaterial 2 has a curved surface whose curvature is substantially equal to that of a later-described main pipe 30 (seeFIG. 8 ). The outside diameter of theflange 3 is set to be greater than the inside diameter of a lateral pipe 31 (seeFIG. 8 ). Theflange 3 is impregnated with a thermosetting resin, which is previously cured in the factory so as to provide a rigid flange whose curvature fits to that of the main pipe. - The
flange 3 may be composed of a vinyl chloride or other thermoplastic resin rather than a thermosetting resin. In this case, theflange 3 and the tubular resin-absorbingmaterial 2 are joined together using an adhesive or the like. - A peeling
tube 5 of predetermined length is passed over the exterior of the tubular resin-absorbingmaterial 2, and one end of the peelingtube 5 is removably attached to the external periphery in the vicinity of theflange 3 of the tubular resin-absorbingmaterial 2. The other end of the peelingtube 5 is open and mounted in an airtight manner to a pressure bag (described later). The same material used for theplastic film 4 may be used for the peelingtube 5. - A
tubular peeling end 6 is removably mounted on the other end of the tubular resin-absorbingmaterial 2. The peelingend 6 is composed of the same material as theplastic film 4 and one end is closed off by aconnector 7. - In the present embodiment, as shown in
FIGS. 3 a to 3 c, a flange-pressing implement 70 having aninner bag 73 that is covered with areinforcement cover 74 is used to bring theflange 3 of the lateral pipe-liningmaterial 1 into close contact with the periphery of the lateral pipe opening of the main pipe. - The
inner bag 73 is fabricated as shown inFIG. 2 . Asheet 71 having acircular opening portion 71 a in the center and protrudingportions sheet 72 similarly having acircular opening portion 72 a in the center and protrudingportions FIG. 2 , aperipheral portion 73 d and the externalperipheral portion 73 e of the openingportions sheets - The
inner bag 73 thus fabricated has an openingportion 73 a that corresponds to the openingportions sheets portion 73 a of theinner bag 73 has a size that allows the cylindrical portion of a later-described head collar to pass. The distal ends of the protrudingportions sheets intake port 73 b for taking in a later-described heat medium. The distal ends of the protrudingportions drainage port 73 c for discharging the heat medium inside theinner bag 73. A heatmedium feed hose 75 and a heatmedium drainage hose 76 are mounted in an airtight manner on the heatmedium intake port 73 b anddrainage port 73 c of theinner bag 73. - As shown in
FIG. 3 a, theinner bag 73 is covered with areinforcement cover 74 made of cashmere, silk, nylon, rayon, or another fiber; or silicon, polyethylene, polyurethane, or another material that does not easily stretch. Thereinforcement cover 74 has anopening 74 a that corresponds to the openingportions sheets portions portions reinforcement cover 74 has a shape similar to that of thesheets sheets reinforcement cover 74′ (FIG. 3 c) similar to thereinforcement cover 74 is provided, and the entireinner bag 73 is covered by the two reinforcement covers 74, 74′ so as to be housed therein. After theinner bag 73 has been covered, aperiphery 74 d of thereinforcement cover 74, an externalperipheral portion 74 e of the openingportion 74 a thereof, and the corresponding portions of thereinforcement cover 74′ are sewn or bonded together to provide a bag-shaped flange-pressing implement 70. - The reinforcement covers 74, 74′ have a shape that is slightly smaller than that of the
sheets inner bag 73. Therefore, thesheets inner bag 73 are housed in a wrinkled state, as shown inFIG. 3 c.FIG. 3 c is a cross-sectional view along the line A-A ofFIG. 3 b, which is not an accurate cross-sectional view, but rather schematically shows theinner bag 73 to be housed in a wrinkled state. - The thus configured flange-pressing implement 70 has an opening
portion 70 a in the center portion into which the cylindrical portion of the head collar can be inserted, and protrudingportions medium feed hose 75 and the heatmedium drainage hose 76 are mounted, as shown inFIG. 3 b. When a fluid (liquid, air) is fed from the heatmedium feed hose 75, theinner bag 73 expands overall in the form of a flat bag and generates a pressing force. At this point, theinner bag 73 is pressed against the reinforcement covers and does not completely expand, thereby preventing breakage or the application of an excessive load to the inner bag. - The external shape of the flange-pressing implement 70 is not limited to being rectangular, as shown in the drawings, and may also be circular or triangular.
-
FIG. 4 shows a metal head collar (pressing jig) 80 that is mounted on a work robot (described later) and a pressure bag to position the lateral pipe-lining material on the lateral pipe. Thehead collar 80 has acurved portion 80 a having a curvature that corresponds to the curvature of the internal peripheral surface of the main pipe. A hollowcylindrical portion 80 b of thehead collar 80 passes through thecurved portion 80 a and extends downward. The outside diameter of thecylindrical portion 80 b of thehead collar 80 is slightly less than the diameter of the openingportion 70 a of the flange-pressing implement 70 so that thecylindrical portion 80 b of thehead collar 80 can pass through the openingportion 70 a of the flange-pressing implement 70. - The
cylindrical portion 80 b of thehead collar 80 is passed through the openingportion 70 a of the flange-pressing implement 70 so that the flange-pressing implement 70 may be mounted on thehead collar 80, as shown inFIG. 5 a. The flange-pressing implement 70 is not particularly required to be secured, but may be detachably mounted on thehead collar 80 using adhesive tape in the case that there is a possibility that the flange-pressing implement 70 will move. - As described below, an adhesive is applied to the flange of the lateral pipe-lining material. In order to prevent the adhesive from flowing onto the flange-pressing implement 70 or the
head collar 80, the flange-pressing implement 70 and thehead collar 80 are covered by aprotective film 81 that is larger than thehead collar 80, as shown inFIG. 5 b. Theprotective film 81 has a central opening portion that has substantially the same diameter as the openingportion 70 a of the flange-pressing implement 70. Therefore, thecylindrical portion 80 b of thehead collar 80 is passed through the opening portion of theprotective film 81, and theprotective film 81 can be placed on the flange-pressing implement 70 and thehead collar 80. Theprotective film 81 is secured to the curved portion of thehead collar 80 using an adhesive or the like so that theprotective film 81 does not move. - Next, the lateral pipe-lining
material 1 shown inFIG. 1 is inserted from the portion (the portion on which theconnector 7 is mounted) of the tubular resin-absorbingmaterial 2 into thecylindrical portion 80 b of thehead collar 80, and theflange 3 thereof is placed on theprotective film 81 so as to cover thecylindrical portion 80 b thereof, as shown inFIG. 6 a. The outside diameter of thecylindrical portion 80 b of thehead collar 80 is made less than the inside diameter of theflange 3 so as to allow thecylindrical portion 80 b of thehead collar 80 to pass through theflange 3 of the lateral pipe-liningmaterial 1 and theflange 3 to lie on thehead collar 80. - In this manner, the lateral pipe-lining
material 1 is placed on thehead collar 80 via theprotective film 81 and the flange-pressing implement 70. An adhesive 82 composed of unsaturated polyester resin, vinyl ester resin, epoxy resin, or the like is then coated onto the surface of the flange 3 (FIG. 6 b). - The lateral pipe-lining
material 1 mounted on thehead collar 80 is accommodated inside apressure bag 43, as shown inFIG. 8 , and thehead collar 80 is mounted in an airtight fashion at one end of thepressure bag 43. - The
work robot 42 has ahead 44 that reciprocates in the vertical direction a, b inFIG. 8 , and is configured so as to rotate (rolling) about the pipe axis in the manner indicated by the arrow c. Thehead collar 80 is mounted on ahead 44. Amonitoring TV camera 46 is disposed on the upper part of thework robot 42. Drawropes work robot 42. Thedraw rope 47 is connected to thepressure bag 43 and theother draw rope 48 is extended to above ground. Thedraw rope 48 is pulled to convey thework robot 42 and thepressure bag 43 so that theflange 3 of the pipe-liningmaterial 1 may be located in the vicinity of thelateral pipe 31 that intersects themain pipe 30. - The open end of the
pressure bag 43 is closed by acap 52, and the other end of the peelingtube 5 that is mounted on the tubular resin-absorbingmaterial 2 of the lateral pipe-liningmaterial 1 is mounted in an airtight manner inside thepressure bag 43. - A
draw rope 40 and ahot water hose 41 that are attached to thecap 52 in an airtight manner are connected to theconnector 7 on which the peelingend 6 of the lateral pipe-liningmaterial 1 is mounted. Thehot water hose 41 passes through thecap 52, extends away from thepressure bag 43, and leads to avalve 53. Ahot water pump 54 feeds hot water (heat medium) to thehot water hose 41 from ahot water tank 55 that is heated by a heat source (not shown). The hot water inside thepressure bag 43 is returned to thehot water tank 55 via adrainage hose 56 andvalve 57. - Hot water is also fed via the
hot water pump 54 and avalve 66 from thehot water tank 55 to the heatmedium feed hose 75 mounted on the flange-pressing implement 70. The hot water inside the flange-pressing implement 70 is returned to thehot water tank 55 via the heatmedium drainage hose 76 and avalve 65. - An airtight space closed off by the lateral pipe-lining
material 1 and the peelingtube 5 is formed inside thepressure bag 43. Acompressor 61 disposed above ground is connected via anair hose 59 andvalve 60 to the airtight space inside the pressure bag to feed compressed air thereto. The airtight space is also in communication with the exterior via adrainage hose 62 andvalve 63 to discharge the compressed air inside the pressure bag to the exterior. - A method for lining a
lateral pipe 31 using the lateral pipe-liningmaterial 1 as described above will now be described. - The
draw rope 48 is pulled to move thepressure bag 43 to the location in which the center of thecylindrical portion 80 b of thehead collar 80 substantially coincides with the axial center of the lateral pipe 31 (FIG. 8 ). - The
head 44 of thework robot 42 is raised in the direction of arrow a to press theflange 3 of the lateral pipe-liningmaterial 1 into close contact with the periphery of the lateral pipe opening of themain pipe 30 via the flange-pressing implement 70. Close contact is reduced when there is manufacturing error in theflange 3 or when there are concavities and convexities in the periphery of the lateral pipe opening. In view of such circumstances, in the present invention, the flange-pressing implement 70 is expanded to press theflange 3 against the periphery of the lateral pipe opening. - Hot water is fed from the
hot water tank 55 via the heatmedium feed hose 75 to theinner bag 73 of the flange-pressing implement 70. The flange-pressing implement 70 is then caused to expand in the form of a flat bag as shown inFIG. 7 b. Hot water that cannot be accommodated is returned to thehot water tank 55 via the heatmedium drainage hose 76. The circulation of hot water through the flange-pressing implement 70 causes elastic pressing force to be produced therein to bring theflange 3 into close contact with theperiphery 30 a of the lateral pipe opening of themain pipe 30.FIGS. 7 a and 7 b are not accurate sectional views of the flange-pressing implement 70, but are schematic views for illustrating the state of expansion. - The pressing force produced by the flange-pressing implement 70 can be adjusted via the
valve 66 by adjusting the feed rate of the hot water to the flange-pressing implement 70. Similarly, the pressing force produced by the flange-pressing implement 70 can also be adjusted via thevalve 65 by adjusting the drainage rate of the hot water returned from the flange-pressing implement 70 to thehot water tank 55. It is also possible to adjust the pressing force of the flange-pressing implement 70 by adjusting both the feed and drainage rates of the hot water. - Hot water at a temperature of about 60° to 90° C. is fed to the flange-pressing implement 70. Therefore, the
flange 3 is gradually heated, and the adhesive 82 coated thereon is cured. This allows theflange 3 to be bonded to theperiphery 30 a of the lateral pipe opening of themain pipe 30. Theflange 3 is composed of a thermosetting resin and the adhesive 82 on theflange 3 is adequately heated by heat conduction by hot water even when the thermosetting resin in theflange 3 has already been cured. In the case that theflange 3 is made of a thermoplastic resin, theflange 3 is softened by heating and comes into closer contact with the periphery of the lateral pipe opening, thus allowing theflange 3 to be bonded to themain pipe 30 more reliably. - In a state in which the flange has made close contact with the periphery of the lateral pipe opening, the
compressor 61 is driven to feed compressed air into the airtight space inside thepressure bag 43 via theair hose 59. This causes the lateral pipe-liningmaterial 1 to be sequentially everted and inserted upward into thelateral pipe 31 under the pressure of the compressed air. - When eversion/insertion of the lateral pipe-lining
material 1 into thelateral pipe 31 has ended as shown inFIG. 9 , the lateral pipe-liningmaterial 1 is kept to be pressed against the internal peripheral surface of thelateral pipe 31, and hot water is fed from the distal end of thehot water hose 41 and filled into the airtight space inside thepressure bag 43. The compressed air inside the airtight space is released into the atmosphere via theexhaust hose 62, while the thermosetting resin impregnated in the tubular resin-absorbingmaterial 2 of the lateral pipe-liningmaterial 1 is heated and cured by the hot water. - In the embodiment as describe above, the flange-pressing implement is expanded before the lateral pipe-lining material is inserted into the lateral pipe. However, rather than expanding the flange-pressing implement before the lateral pipe-lining material is inserted into the lateral pipe, it is also possible to expand the flange-pressing implement when the lateral pipe-lining material is inserted or being inserted into the lateral pipe, or when the curable resin impregnated in the tubular resin-absorbing material is cured after insertion has been completed, or after curing has been started.
- When the resin impregnated in the tubular resin-absorbing
material 2 has cured, hot water is released from the airtight space via the heatmedium drainage hose 56 and returned to thehot water tank 55. The hot water inside the flange-pressing implement 70 is also returned to the hot water tank via the heatmedium drainage hose 76. - When the lateral pipe-lining
material 1 has cured, thehead 44 of thework robot 42 is lowered in the direction of the arrow b in the drawing and the flange-pressing implement 70 is separated from theflange 3 of the lateral pipe-liningmaterial 1. Thedraw rope 40 is thereafter pulled in the leftward direction inFIG. 9 . At this point, the peelingtube 5, the peelingend 6, thehot water hose 41, and the like are pulled in the same direction and removed from the lateral pipe-liningmaterial 1. - The
work robot 42, thepressure bag 43, and the like are then removed from inside themain pipe 30 to finish the lining of the internal peripheral surface of thelateral pipe 31. - In place of hot water, the heat medium used for expanding the flange-pressing implement 70 and heating the adhesive 82 on the
flange 3 may be hot air or a heated liquid. The heat source for obtaining hot air or the heat source for heating the liquid, and a circulation system for circulating the hot air or the heated liquid is prepared in the case that hot air or heated liquid is used as the heat medium. - In the embodiment described above, the medium for heating the adhesive 82 is the same fluid for expanding the flange-pressing implement 70, but instead it is possible to use a
heater 90 such as that shown inFIG. 10 to heat the adhesive 82. Theheater 90 is composed of a Nichrome wire or anotherserpentine heater wire 90 a that produces heat when voltage is applied. Theheater 90 is overall covered by acover 91 having waterproofness and insulative properties. Thecover 91 is substantially the same size as the flange-pressing implement 70, and anopening portion 91 a having the same size as the openingportion 70 a of the flange-pressing implement 70 is formed in the center of thecover 91. Theheater 90 is energized from above ground. - The
heater 90 is disposed on the flange-pressing implement 70 protected by theprotective film 81, and thecylindrical portion 80 b of thehead collar 80 is inserted through the openingportion 91 a of theheater 90 to receive theflange 3 of the lateral pipe-liningmaterial 1 on theheater 90. In this case, a single hose is connected to the flange-pressing implement 70 to feed compressed air from thecompressor 61 because a fluid circulation system would not be required. - In
FIG. 7 , theheater 90 is disposed between theprotective film 81 and theflange 3 of the lateral pipe-liningmaterial 1. When the flange-pressing implement 70 is expanded using compressed air and theheater 90 is energized, theflange 3 is pressed against theperiphery 30 a of the lateral pipe opening of themain pipe 30 in the same manner as when hot water is used. Since the adhesive 82 on theflange 3 is heated and cured by theheater 90, theflange 3 can be secured to themain pipe 30 in a state of reliable close contact therewith in the same manner as when hot water is used. -
FIG. 11 shows another embodiment of the flange-pressing implement in which anexpandable tube 100 is wound a plurality of times about thecylindrical portion 80 b of thehead collar 80. Thetube 100 wound about thecylindrical portion 80 b is bundled byelastic tapes 101 to prevent disassembly. A hose (not shown) is attached in an airtight manner to a mountingend 100 a of thetube 100, and another hose (not shown) is also attached to theother end 100 b of thetube 100. - The
tube 100 expands in a circular or elliptical shape when hot water is fed from thehot water tank 55 via one of the hoses. The excess hot water in thetube 100 is returned to thehot water tank 55 via the other hose. An elastic pressing force is generated in thetube 100 by circulating hot water. By positioning theflange 3 of the lateral pipe-liningmaterial 1 on thetube 100, theflange 3 can be advantageously pressed against the periphery of the lateral pipe opening of the main pipe and the adhesive on theflange 3 can be heated by the hot water in thetube 100 in the same manner as the flange-pressing implement 70. Therefore, theflange 3 can be reliably secured to the main pipe. - The pressing force produced by the
tube 100 can be adjusted by adjusting the feed rate of the hot water to thetube 100 via thevalve 66, by adjusting the drainage rate of the hot water to thehot water tank 55 via thevalve 65, or by adjusting both the feed and drainage rates of the hot water. - In place of hot water, it is also possible to use a heated liquid, or hot air as the heat medium in the same manner as the flange-pressing implement 70.
- The flange-pressing implement 70, the
protective film 81, and the lateral pipe-liningmaterial 1 may be mounted on thehead collar 80 after thehead collar 80 has been first positioned on the work robot. It is also possible to first mount the flange-pressing implement 70 and theprotective film 81 on thehead collar 80, then position thehead collar 80 on the work robot, and thereafter position the lateral pipe-liningmaterial 1 on thehead collar 80. - In the embodiment described above, the
head 44 of thework robot 42 lifts thehead collar 80 upward from one side (the right side inFIG. 8 ), and theflange 3 presses against themain pipe 30. Accordingly, there is a problem in that the orientation of thework robot 42 becomes unstable due to the reaction. - In view of this situation, the lower portion of the
head collar 80 is covered by acover sheet 120, as shown inFIG. 12 a. Thepressure bag 43 is caused to expand by compressed air and makes contact with thecover sheet 120 to support the opposite side (the left side inFIG. 8 ) of thehead collar 80. - The
cover sheet 120 is a soft cover material composed of cloth or plastic, and tightly stretched over the lower portion of thecurved portion 80 a of thehead collar 80. Oneend 120 a and theother end 120 b of thecover sheet 120 are folded back and secured to the flange-pressing implement 70 using an adhesive (FIG. 13 a). Theopening portion 120 c through which the pipe-liningmaterial 1 can pass is formed in the center portion of thecover sheet 120 in a position that corresponds to thecylindrical portion 80 b of thehead collar 80. A hole (not shown) through which the distal end of thehead 44 of thework robot 42 can pass is also formed in thecover sheet 120. - After the
head collar 80 has been covered with thecover sheet 120, thehead collar 80 is covered with theprotective film 81, as shown inFIG. 12 b. The lateral pipe-liningmaterial 1 is thereafter positioned on thehead collar 80 and the adhesive 82 is coated onto theflange 3 in the same manner as shown inFIGS. 6 a and 6 b. - The same steps are carried out as those illustrated in
FIGS. 8 and 9 in the case that the lateral pipe is lined using thehead collar 80 covered with thecover sheet 120. In the case that thehead collar 80 is covered by thecover sheet 120, a portion of thepressure bag 43 expands by compressed air for everting the lateral pipe-lining material and makes contact with thecover sheet 120 to support the opposite side of the head collar 80 (the left side inFIG. 14 ), as shown inFIG. 14 . This state is also shown inFIG. 13 b by thepressure bag 43 shown by the imaginary line. - In this manner, the
head collar 80 is supported on two sides by thepressure bag 43 and thehead 44 of thework robot 42. It is possible to prevent thework robot 42 from being affected by a force that destabilizes the orientation of thework robot 42, and the work for lining a lateral pipe can be carried out in a smooth fashion. - The
cover sheet 120 is provided across thehead 44 side of thework robot 42 as well as the opposite side thereof, but there is no particular requirement that thehead 44 side be covered by thecover sheet 120, and such a portion may be omitted.
Claims (24)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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JP2009-096912 | 2009-04-13 | ||
JP2009096912 | 2009-04-13 | ||
JP2009-96912 | 2009-04-13 | ||
JP2009134580A JP5457076B2 (en) | 2009-04-13 | 2009-06-04 | Branch pipe lining method |
JP2009-134580 | 2009-06-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20100258244A1 true US20100258244A1 (en) | 2010-10-14 |
US9200742B2 US9200742B2 (en) | 2015-12-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/798,797 Expired - Fee Related US9200742B2 (en) | 2009-04-13 | 2010-04-12 | Lateral pipe-lining method |
Country Status (5)
Country | Link |
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US (1) | US9200742B2 (en) |
EP (1) | EP2241795A3 (en) |
JP (1) | JP5457076B2 (en) |
KR (1) | KR20100113450A (en) |
SG (2) | SG185290A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150354743A1 (en) * | 2014-06-06 | 2015-12-10 | Olimb Group As | Arrangement and method for lining pipes |
EP2447590A3 (en) * | 2010-11-02 | 2016-03-09 | Shonan Gosei-Jushi Seisakusho K.K. | Lateral pipe lining method and lateral pipe lining apparatus |
WO2017061944A1 (en) * | 2015-10-09 | 2017-04-13 | Pressure Pipe Relining Sweden Ab | Liner having no coating utilized for relining a heating pipe |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5534585B2 (en) * | 2010-01-29 | 2014-07-02 | 株式会社湘南合成樹脂製作所 | Branch pipe lining manufacturing method |
JP6080085B2 (en) * | 2013-02-27 | 2017-02-15 | 株式会社オクムラ道路 | Branch pipe connecting device and method to sewage pipe lining tube |
DE102018121098A1 (en) * | 2018-08-29 | 2020-03-05 | AWT Decker GmbH | Process for the repair of a pipeline on a watercraft or a structure at sea, and pipeline of a watercraft or a structure at sea |
KR102450177B1 (en) * | 2019-04-11 | 2022-09-30 | 가부시키가이샤 쇼난 고세이쥬시 세이사쿠쇼 | Pipe lining material and manufacturing method thereof |
RU2731222C1 (en) * | 2020-02-21 | 2020-08-31 | Публичное акционерное общество Научно-производственное объединение "Искра" | Device for solidification of heat-insulating coating of housing with flange |
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JP4566635B2 (en) * | 2004-07-07 | 2010-10-20 | 株式会社湘南合成樹脂製作所 | Existing pipe lining method and lining material collar |
ATE403964T1 (en) * | 2005-01-28 | 2008-08-15 | Fibre Optics Ct Gmbh Consultin | REUSABLE SEALING, LIFTING AND/OR SECURING DEVICE |
JP4682105B2 (en) * | 2006-08-03 | 2011-05-11 | 株式会社湘南合成樹脂製作所 | Branch pipe lining material and branch pipe lining method |
JP2008168468A (en) | 2007-01-10 | 2008-07-24 | Shonan Plastic Mfg Co Ltd | Branched pipe lining material and branched pipe lining technique |
US8316892B2 (en) * | 2007-04-03 | 2012-11-27 | Liqui-Force Sewer Services Inc. | Lateral liner with seal |
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2009
- 2009-06-04 JP JP2009134580A patent/JP5457076B2/en not_active Expired - Fee Related
-
2010
- 2010-03-25 EP EP10157823A patent/EP2241795A3/en not_active Withdrawn
- 2010-03-26 KR KR1020100027337A patent/KR20100113450A/en unknown
- 2010-03-31 SG SG2012075537A patent/SG185290A1/en unknown
- 2010-03-31 SG SG201002256-4A patent/SG166056A1/en unknown
- 2010-04-12 US US12/798,797 patent/US9200742B2/en not_active Expired - Fee Related
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US3351509A (en) * | 1962-12-28 | 1967-11-07 | Youngstown Sheet And Tube Co | Method of making a reinforced hollow plastic article of wrapped tapes of fibrous material |
US3996967A (en) * | 1972-10-18 | 1976-12-14 | Takata Kojyo Co., Ltd. | Reinforced lining for tubes |
US5329063A (en) * | 1991-05-31 | 1994-07-12 | Get, Inc. | Liner assembly for lining branch pipes and a method for manufacturing the liner assembly |
US5566719A (en) * | 1994-07-05 | 1996-10-22 | Shonan Gosei-Jushi Seisakusho K.K. | Method for lining a branch pipe of an underground pipe |
US6001212A (en) * | 1996-03-25 | 1999-12-14 | Insituform (Netherlands) B.V. | Method for lining of lateral pipelines with flow-through apparatus |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2447590A3 (en) * | 2010-11-02 | 2016-03-09 | Shonan Gosei-Jushi Seisakusho K.K. | Lateral pipe lining method and lateral pipe lining apparatus |
US20150354743A1 (en) * | 2014-06-06 | 2015-12-10 | Olimb Group As | Arrangement and method for lining pipes |
WO2017061944A1 (en) * | 2015-10-09 | 2017-04-13 | Pressure Pipe Relining Sweden Ab | Liner having no coating utilized for relining a heating pipe |
Also Published As
Publication number | Publication date |
---|---|
JP2010264736A (en) | 2010-11-25 |
SG166056A1 (en) | 2010-11-29 |
KR20100113450A (en) | 2010-10-21 |
EP2241795A2 (en) | 2010-10-20 |
US9200742B2 (en) | 2015-12-01 |
EP2241795A3 (en) | 2013-03-06 |
SG185290A1 (en) | 2012-11-29 |
JP5457076B2 (en) | 2014-04-02 |
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